Because this is a custom, offline build, there are no anti-tamper measures. But that’s not the appeal. The appeal is that the build was locked—no updates, no patches, no rebalancing. The version you downloaded on May 18th, 2020, is the exact same version everyone runs today. This creates a perfectly static environment for competition.
The most famous exploit in the build occurs exactly 180 frames (3 seconds at 60 FPS) after a slide-jump. If a player inputs a grapple command on the exact frame the slide animation ends, the game fails to reset the vertical velocity. This allows runners to "fly" horizontally for the rest of the level without touching the ground.
You might ask: If this isn’t a real game, why do people compete on it?
The answer lies in theorycrafting and pure execution. Mainstream speedrunning involves memorizing levels and executing precise inputs. Build 18052020 is more like a sport. It presents a sandbox with a single rule: go as fast as possible.
The community (which now lives on a dedicated Discord server called #Build1805) treats the build like a digital athletics arena. They have created leaderboards for:
Because the physics are so volatile, world records on these leaderboards are broken not by seconds, but by fractions of a single frame.
Some believe 18052020 was a stealth patch for Half-Life 2 that accidentally reintroduced the “superboost” glitch. Valve allegedly reverted it within 48 hours, but not before runners captured records using it. The only remaining evidence? A single Reddit comment saying, “thank you build 18052020” — now deleted. speedrunners build 18052020
The build’s geometry engine was intentionally flawed. Due to a rounding error in the collision detection (attributed to the build’s hasty 48-hour development period), players who move faster than 800 units per second can actually phase through thin walls. This turned any level into a non-linear web of potential "out-of-bounds" skips.
Despite its obscurity, you can still experience this piece of speedrunning folklore.
Warning: Because the original Speedrunners_build_18052020.exe was distributed on a free forum, it is not available on Steam, Itch.io, or any official store. You must find archival copies through community hubs.
Once launched, you are greeted with a stark grey screen, a timer, and a command line. Type load track1 to start the first community-made level: "Initiation."
Unlike modern speedruns which are heavily Nether-focused, the 1.14.4 build relied on aggressive Overworld exploitation.
In the world of SpeedRunners , New Rush City has a bizarre problem: there are simply too many superheroes. Rather than working together, these heroes have turned crime-fighting into a high-stakes competitive sport where getting to the scene first is the only thing that matters. Because this is a custom, offline build, there
The primary narrative follows SpeedRunner, a hero who believes himself to be the fastest man alive and rarely stops running just to prove it. His obsession with speed and fame has turned the city into a chaotic race track, leading to major rivalries: The Rivalry with The Falcon : As the city's former top hero, The Falcon
resents being displaced by SpeedRunner. He views the new generation as reckless and destructive, ultimately leading him to recruit others to take SpeedRunner down. The Detective's Dilemma:
(Detective Gillian) is a hard-boiled investigator who finds it impossible to solve crimes because SpeedRunners keep destroying crime scenes before he can collect evidence. Influenced by The Falcon
, he confronts the runners to stop the disruption of justice. The Old Guard: The Original Mr. Quick
, a runner from 20 years ago when the city was just called "Rush City," views the modern runners as "hotshot wise-guys" who have ruined the sport with items and gadgets. He represents an elitist, "pure" era of running.
While the "build 18052020" (May 18, 2020) timeframe doesn't refer to a specific narrative overhaul, the SpeedRunners Story Mode Because the physics are so volatile, world records
expands this lore through unlockable digital comic books like " Welcome to New Rush City " and " Officer Requesting Backup ," which provide deeper background on why characters like (a bound prisoner) or (a cosmic entity) are participating in the race. Is there a backstory to each character? - Steam Community
Developed by DoubleDutch Games and published by tinyBuild, SpeedRunners is a cut-throat multiplayer racing game where four players compete to knock each other off-screen. Using grappling hooks, power-ups, and interactive environments, players must maintain momentum through complex loops. Key Features of Build 18052020
This build represents the state of the game following its high-profile Nintendo Switch launch in early 2020. Key features of this version include:
Diverse Roster: Access to over 50 unlockable characters, including favorites like Unic and Sherlock Bones.
Competitive Modes: A full league system and ranked matches that were refined over years of early access development.
Level Editor: Integration with the Steam Workshop, allowing players access to thousands of user-created maps beyond the official campaign.
Local & Online Play: Support for 2v2 "Team Play" modes and cross-platform capabilities that were perfected during this era. Technical Requirements
The 18052020 build is known for its accessibility, running on hardware ranging from legacy Windows XP systems to modern Steam Deck configurations. Download SpeedRunners Build 18052020 + ONLINE